How do you solve 90% of 20?
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This is not as hard as it seems. All shapes will follow ratios when they undergo a change in overall size. The first part is finding the size of line G-A. Since we know perimiter, we can simply subtract the other sides from the total permitier. This gives us that GA is 30. Since the ratio of
= 
, we can simply do 14/35 = x/30. Sp x = 30*14/35 =12